干旱胁迫对不同基因型玉米产量及其构成因素的影响

Effects of Drought Stress on Yield and Yield Components of Different Genotypes in Maize

以6个普通玉米品种为材料,在京郊大田条件下,采用裂区区组设计,分析干旱胁迫对不同基因型玉米产量及其构成因素的影响。结果表明,干旱胁迫显著影响了玉米产量(P<0.01)、穗数(P<0.05)、穗粒数(P<0.05)和千粒重(P<0.05),干旱胁迫对6个参试玉米品种产量影响存在显著差异(P<0.05),其最终产量降低幅度为京农科728<郑单958<农华101<MC703<联创808<登海618,其相应基因型穗数、穗粒数、千粒重等穗部性状与产量降低的趋势一致。

The experiments were split randomized block designed, drought stress as the main block, genotypes as the sub-blocks, and sub-blocks were randomized within the main blocks. The results of this study showed that drought stresses significantly affected maize yield(P<0.01), ear density(P<0.05), kernel numbers per ear(P<0.05),and thousand kernel weight(P<0.05). Different genotypes cultivar significantly difference by drought stress(P<0.05),the yield decreased in JNK728<ZD958<NH101<MC703<LC808<DH618, the corresponding genotypes of ear density, Kernel numbers per ear, and thousand kernel weight were the same trend as yield decreased.